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English and Scientific names: |
“Audubon’s” Yellow-rumped Warbler
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Number of individuals: |
1 male in winter plumage |
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Locality: LOUISIANA: |
Jefferson |
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Specific Locality: |
entrance to TNC Grilleta Tract, Grand Isle |
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Date(s) when observed: |
22 Dec 2008 |
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Time(s) of day when
observed: |
9:30am and again at 1:00pm |
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Reporting observer and address: |
Erik I. Johnson Lafayette, LA |
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Other observers accompanying reporter who also
identified the bird(s): |
EJ Raynor, Chris Brantley |
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Other
observers who independently identified the bird(s): |
David Muth, Curt Sorrells, Dan Purrington (I believe – they first found two individuals a couple weeks earlier) |
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Light
conditions (position of bird in relation to shade and to direction and amount
of light): |
sunny – bird in
contrasting light at various angles |
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Optical equipment: |
Swarovski 10x42 EL |
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Distance to bird(s): |
10-15m |
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Duration of
observation: |
10 min, then 5 min
later in afternoon |
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Habitat: |
open hackberry grove with little understory vegetation |
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Behavior of bird: |
actively foraging (gleaning and sallying) |
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Description: |
Clearly a Yellow-rumped Warbler with a bright yellow rump,
overall brownish upperparts (with some blue in the shoulder and tail coverts
suggesting male), creamy lightly streaked underparts, and extensive white to
outer tail feathers. Plain-looking
face - lacked pale supercilium and lacked pale crescent extending around
auriculars from throat. Also
yellowish throat appearing smaller with malar area mostly brown. |
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Voice: |
not as flat as “Myrtle” Warblers with it – reminiscent of Palm Warbler |
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Similar
species: |
): Separated from “Myrtle” Warbler by lack of pale supercilium, pale auricular band extending from throat, yellowish (not whitish) throat which was smaller than typical “Myrtle” throat patch with brown in malar area broader than in “Myrtle” |
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Photographs
or tape recordings obtained? |
yes |
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Previous
experience with this species: |
seen a few times in breeding plumage out west. Lots of experience with “Myrtle” Warbler and familiar with differences in plumage characteristics between “Myrtle” and “Audubon’s” in winter plumage before seeing this bird. |
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Identification aids: |
Sibley’s Guide, National Geographic, Warblers of NA, Pyle Guide |
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This description is written from: |
notes made during the observation |
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Are
you positive of your identification? If not, explain: |
yes |
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Reporter: |
Erik I. Johnson
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Date and time: |
Date: 30 Dec 2008 Time: 12:30pm |
(age unknown)